Rolling-mill.



E. THOMAS. ROLLING MILL.

APPLICATION FILED JAIL27, 1912.

Patented Jan. 6, 1914.

HJIIIIIIIIIIIIIIIIHH Mlllllllllllllllllllil EDMUND THOMAS, OF ERIE, PENNSYLVANIA.

ROLLING-MILL.

Specification of Letters Patent.

Patented Jan. 6, 191 1.

Application filed January 2'7, 1912. Serial No. 673,778.

To all whom it may concern Be it known that I, EDMUND THOMAS, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Rolling-Mills, of which the following is a specification.

The present invention relates to certain novel and useful improvements in mills for rolling and welding tubes, bars and rods.

In carrying out my invention, it is my purpose to provide a mill by means of which seamless or lap-welded bodies of metal such as tubes and the like may be rolled to any desired form or shape, such as round, square or other selected contour.

In the present instance, I have shown my invention as embodied in a three-roll high and in a two-roll high mill, and in the structure shown the rolls are provided with grooves arranged at such relative angles and cooperating in such manner that, in case of the three roll high mill when the billet is passed through one set of rolls, it is in position for the passage of the second set without turning or shifting such billet. Furthermore, by arranging the grooves in the rolls at an angle to the bodies of such rolls and opposite one another, one roll presses upwardly and the other downwardly on the tube or bar, thus imparting to the tube or bar the desired cross sectional configuration and eliminating crystallization of such tubes or bars and keeping the tubes from flanging in the first pass and lapping in the second pass. Furthermore, in my improved mill, 1 provide the flange of each of the rolls with ribs adapted to lie within a groove in the adjacent roll for the purpose of taking up the side pressure of the carriages in the housing and preserving the rolls in accurate and uniform rolling relation.

In the practice of my invention, 1 wish it to be understood that I do not limit myself to any particular arrangement of the angles of the grooves in the roll, as they may be formed or cut to roll any desired shape of billet or tubing.

With the above-recited objects, and others of a similar nature in view, the invention consists in the construction, combination and arrangement of parts, set forth in and falling within the scope of the appended claim.

In the accompanying drawing :-Figure 1 is "a view in elevation of a three roll high mill embodying my invention. Fig. 2 is a vertical sectional view taken on the line 2--2 of Fig. 1. Fig. 3 is a view in elevation of a two roll high mill.

Referring now to the accompanying drawings in detail, and especially to Figs. 1 and 2, showing the three roll high construc tion, the numerals 11 indicate the housing or frame of the mill, while the numerals 2, 3 and 1, designate the bottom, central and top rolls, respectively. Each of the rolls is provided with the usual stub shaft 5 projecting from the ends 5 of the rolls. The lower roll 2 is provided adjacent to one end with a thickened flange portion 6 having teeth 7, or if desired, ribs in place of teeth, which teeth are designed to project into and rotate within the grooved portion 8 in the adjacent thickened flange 9 of the central roll 3. Similarly the top roll 4; is provided with teeth 10 also adapted to lie within the groove 8 as will be seen from the drawings. At the inner end of the flanged portion 6 of the lower roll is a relatively narrow flange 11 adapted to lie within the shouldered or cut away section 12 of the central roll while the top roll 4 is provided with a similar thin flange 13 which also lies within the shouldered portion 12 of the central roll. At the opposite end of the lower roll the thickened flange portion 1 1 is provided with a groove 15 for the reception of the teeth 16 carried by the flanged edge 17 of the central roll,

said teeth 16 also rotating within the groove 18 of the thickened flange 19 of the top roll.

The lower roll 2 is grooved as at 20, said grooves being formed at an angle in the body of the roll while the central roll 3 is oppositely grooved at an angle as at 21 and likewise the top roll 4: is curved at an angle as at 22 opposite to the angle or direction ofthe groove of the center roll. The grooves formed by the union of the rolls, as shown in Fig. 1 are adapted to form passages for the billet, bar or tube, and it will be noted that the grooves of each pass extend in the opposite direction or at an opposite angle to each other. Consequently, when the billet or tube has been passed through tie lower groove or set of passes it is in position for the return or reverse pass through the upper set of rolls without the necessity of imparting the usual half-turn or twist to the body being rolled. it will, of course, be understood that I am not limited to the precise angle or shape of the grooves in the body of the rolls as these may be varied to present either a circular or other character of pass.

In Fig. 3, I have shown my invention as applied to a two-high mill, employing two rolls, but as the construction of rolls 23 and 24 is, as heretofore described for the construction of the individual rolls of the three high mill, a detailed description of the same is unnecessary.

It will be seen that in the two roll high mill the groove in one roll is arranged at an angle and in opposition to the groove in the adjacent roll thereby enabling me to dispense with the use of vertical guide rolls.

I claim I A device of the kind described comprising two standards, three shafts mounted in said standards, a cog wheel fixed at each end of the intermediate of said shafts, a pair of flanges straddling one of said cog wheels and being larger in diameter than the latter whereby a groove is formed around said cog wheel, a plurality of spaced-apart relatively narrow flanges formed upon said intermediate shaft between said cog wheels equal in diameter to said first-named flanges, a reduced collar being formed on one side of each of said flanges disposed between said cog wheels, said shaft being formed with configurating peripheral surfaces connecting said collars and said flanges at points spaced from the periphery of the latter, a pair of relatively large flanges mounted at the same end of said other shafts and straddling said other cog wheel at diametrically opposite points, cog wheels mounted between said last named pairs of flanges and meshing with said last-named cog wheel, cog wheels formed at the opposite end of said other shafts meshing with said first named cog wheel, relatively narrow spaced apart flanges formed upon said last-named shafts extending together with said large flanges contiguous to the collars of said in termediate shaft and in overlapping relation to the flanges of the latter and reduced collars formed on said last-named shafts between which the first-named narrow flanges are disposed, said last-named shafts being formed with configurating peripheral surfaces connecting said last-named collars and the narrow flanges confronting the same, at points spaced inwardly from the periphery of the latter.

In testimony whereof I mix my signature in presence of two witnesses.

EDMUND THOMAS. Witnesses:

F. J. BARRETT, GEO. BROWN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0. 

